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The 65,000 people attending will be hoping to see the brand new smartphones on offer

Leave your favorite idea for a new smartphone feature in the comment section below

Each February, the world's mobile technology fanatics wait excitedly to see what will be revealed at the Mobile World Congress in Barcelona -- and this year's event promises to be bigger than ever.

As 65,000 people descend on the Fira Gran Via hoping to catch a glimpse of the latest smartphones, boasting everything from quad-core processors to high-definition screens, we're asking readers what features they want to see on the phones of the future.

From the simplest development to the most mind-blowing innovation, we'd like to hear what smartphone feature you want now. Tell us in the comment section below, send us a Vine video or commenton Twitter using the hashtag #cnnfuturemobile